Abstract
C-arm fluoroscopy is modelled as a perspective projection, the parameters of which are estimated through a calibration procedure. It has been universally accepted that precise intra-procedural calibration is a prerequisite for accurate quantitative C-arm fluoroscopy guidance. Calibration, however, significantly adds to system complexity, which is a major impediment to clinical practice. We challenge the status quo by questioning the assumption that precise intra-procedural calibration is really necessary. We derived theoretical bounds for the sensitivity of 3D measurements to mis-calibration. Experimental results corroborated the theory in that mis-calibration in the focal spot by as much as 50 mm still allows for tracking with an accuracy of 0.5 mm in translation and 0.65o in rotation, and such mis-calibration does not impose any additional error on the reconstruction of small objects.
This work has been supported by NIH 1R43CA099374-01 and NSF EEC-9731478.
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© 2005 Springer-Verlag Berlin Heidelberg
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Jain, A., Kon, R., Zhou, Y., Fichtinger, G. (2005). C-arm Calibration – Is it Really Necessary?. In: Duncan, J.S., Gerig, G. (eds) Medical Image Computing and Computer-Assisted Intervention – MICCAI 2005. MICCAI 2005. Lecture Notes in Computer Science, vol 3749. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11566465_79
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DOI: https://doi.org/10.1007/11566465_79
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